TREA

Brian David Havens

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  • Northglenn, CO, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    P-trap drainage device
    • Patent number 7,472,435
    • Issue date Jan 6, 2009
    • Brian David Havens
    • E03 - WATER SUPPLY SEWERAGE
  • Information Patent Grant

    Device to assist P-trap drainage
    • Patent number 7,131,150
    • Issue date Nov 7, 2006
    • Brian David Havens
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

  • Information Patent Application

    P-trap drainage device
    • Publication number 20070056093
    • Publication date Mar 15, 2007
    • Brian David Havens
    • E03 - WATER SUPPLY SEWERAGE